Do Animals Have Personality?

Curious or fearful, introverted or extroverted, negative or positive. These are all terms we might use to describe another human being’s personality. But what about other species? Can they be described in the same terms? Are there differences in animal personalities among individuals, between different herds or groups, within families–and what does this mean for their survival? Do emotion, genetics and circumstance come into play in defining the personality of another species?